Boiler furnace



Nov, 4 1924.

G. S. KENT BOILER FURNACE Filed April 2 192; :5 Sheets-Sheer 1 mmswro/z Arra /vim f 1921 5 Sheets-Sheet. 2

NOV. 4

G. S. KENT BOILER FURNACE Filed April 2 il atented Nov. 4-, 1924.

arr

GEORGE S. KENT, 0F BUFFALO, NEEV YORK.

BOILER summon.

Application filed April 2,

To aZZ whom it may concern.-

Be it known that I, GEORGE S. KENT, a V citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Boiler Furnaces, of which the following is a specification.

This invention relates to boiler furnaces of the kind which are used; in connection with steam boilers and in which the fireis partly supported by water bars or tubes.

The objects of this invention are. to provide a furnace of this kind having improved draft means whereby a more perfectcombustion of the fuel is obtained 3 also to provide improved means for facilitating the passage of the products of. com bustion. from the furnace to the boiler. Other objects are to provide improvements in water bars or tubes, connecting the preheating or feed water heating drums of steam boilers. Further objects are to provide. improvements in boilers "in the other respects hereinafter described and claimed.

In the accompanying drawings I Fig. 1 is a front elevation of a boiler furnace embodying the invention.

Fig. 2 is a fragmentary sectional elevation thereof. Fig. 3 is a sectional elevation thereof.

Fig. 4 is a section through a pair of the preheater and settling drums. v

Fig. 5 is a sectional elevation of the boiler furnace. Fig. 6 a fragmentary horizontalsection thereof on line 66, Fig. 5, showing the air conduits.

Fig. 7 is an elevation showing the air or draft openings of the air conduit.

A represents a fire tube boiler mounted in a suitable housing or furnace including side walls B and C. D designates the front wall of the furnace, E a door permitting access to the lire tubes of the boiler, F a pair of fuel doors disposed at opposite sides of the furnace front, which doors are provided with air admission valves G. v

According to the invention two grates designated as 10 are provided, these grates being spaced apart beneath the boiler and extending along the inner sides of the walls of the furnace. The grates are each suitably mounted at one side in the adjacent side wall of the furnace, the other sideof each of the grates being mounted on sup- 1921. Serial n0. asaoev.

ports orblocks 11 which are preferably constructed of suitable refractory material as firebricks or the like. These supports or blocks 11 rest upon intermediate parallel. walls 12 which extend longitudinally of the furnace, are spaced apart and which together with the refractory supports 11 form the respective inner walls of the ash pits18. The grates are of such size and so positioned as to provide alongituclinal,space or pasre .1 hi h ext nds subs an ial y neut a yb ejathft oil an b we nthst firesv and the gratesupporting walls.12.j'lhis passage is provided for thepurpose of permitting and facilitating a very complete combustion of the fuel and of the products of, combustion passing out from over. the

grates, and 15 designates a draft door in the furnace frontvvhich opens into the space 14, whereby additional air may be supplied as desirechto the products of combustion as they pass out from the grates. The lower portion of space 14 serves as an auxiliary ash pit and may be cleaned out through door 15, and by having this space 14 extend down to the floor as illustrated, any large quantity or body of cold air admitted to the furnace when one of the doors ofxthe. furnace islopened will drop down and remain in the lowerorauxiliary ash pit portion of space 14: and as it becomes heated gradually rise and mix with the products of combustion, without chillingthe boiler. '16 and17 designate clean-out and draft doors which permit access to the ash pits 13, and 18 and and 1 9 designate a pair of doors which pere mit access to the grates and to the lower portions offa body or mass of fuel, resting upon the gratesso as to permit of the, customary use of slicing bars or similar devices'and also, if necessary, topermit of the introduction of air directly to the grates. It will thus be seen that air is introduced to the. green fuel at the upperpart of'the mass of fuel upon the grates and,in addition, as

the products of combustion pass out from thegrates and enter the passage 14, a more complete combustion maybe secured by admitting a necessary quantity of air through door 15. If desired, air may also be introduced directly tothegrate and beneath the grate. This makes possible substantially perfect combustion of all ordinary fuels and the elimination and consumption of all smoke.

' passageways 20 which extend substantially lengthwise of the boiler and which may, as illustrated, be formed by the introduction of a channel beam 21 into a suitable recess in each of the side walls of the furnace.

I Each channel 20 is open at one end and the admission of air to said channels is controlled by means of a door or the like 22.

' These channels or passageways are connected with the fire chambers by a suitable number of air admisson or draft openings 23 whereby air is admitted from the channels 20 directly to the sides of the masses of fuel upon the grates. In the preferred form illustrated, these draft or air admission openings preferably taper from the inner sides of the side walls to the air or draft channels 20, that is to say, the openings are provided with enlarged mouths whereby air passing into the fuel from the channels 20 is permitted to spread out and diffuse as it enters the mass of fuel. As best illustrated in Fig. 5 of the drawings, these draft openings preferably extend inwardly and downwardly which prevents to a certain extent the filling of these openings with ashes or other obstructions Each fire chamber is preferably provided on its inner side with a plurality of water bars or tubes which confine the fire in the fire chambers. In the embodiment of the invent'on shown in the drawings, the water bars and tubes are constructed as follows 24 designates a pair of water drums or tubular headers disposed at opposite sides of the combustion space 14 and connected by suitablerisers 25, Fig. 3, with the boiler. 26 designates a pair of settling drums or tubular headers connected w th the boiler by means of risers 27, and 28 designates a plurality of water bars or tubes, a series of which connects each of the drums 2a with its adjacent drum 26. The drums 24 are preferably offset relatively to drums 26, in such manner, for example, as shown in Fig. 5, where the drums 24 are closer to the re spective outer walls of the furnace than the drums 26. As best illustrated in Fig. 5, the drums and water bars are preferably so positioned that they form a grate at the inner side of each of the fires thereby furnishing lateral support for one side of each In order to facilitate the insertion of the ends of the water bars into the headers in case it is necessary to replace a defective bar by a new one, and to prevent the o1;-

' low the hump.

ing taken up in the bends or angles between the ends and the central portion without disturbing the connections between the ends of the tubes and the drums. The lower ends 29 of the tubes at their junctures with the central portions form outwardly projecting shoulders which tend to support the mass of fuel upon grates 10 and which will support the coke bed of the fire and permit a most effective cleaning of the grates.

This sha in of the water bars ma be accomplished by bending the ends of the bars in opposite directions from the central or offset portion, as is obvious. This bending or shaping of the tubes forms a fuel supporting hump a short distance above the bottom of the grate, the tubes above the hump being curved inwardly toward the center of the furnace to form concave fuel receiving portions, the hump and the concave fuel receiving portions being adapted for supporting the fuel firmly while ashes are being removed from the bottom grate be- Each of the drums 24 and 26 is provided with openings oppositely disposed to the openings into which the water bars project, for the purpose of permitting the introduction of a suitable tool into the tubes to expand or upset the ends of the tubes or Water bars in securing the water bars to the drums, these opposite openings being closed by means of plugs 31 and 32. As illustrated in Fig. A of the drawings, the water bars may be readily inserted in place between and connecting the drums and may be easily removed and replaced, it merely being necessary as illustrated in that figure of the drawing, in broken lines, to insert one end of a bar in the opening in one of the drums or headers, the other end of the bar being clear of the other drum or header, and then to turn the bar through an angle of about 180, the bar turning about the axis of its inserted end, and insert the other end of the bar in the other drum or header of the pair, by moving the bar in a direction substantially parallel to the ends thereof, as shown in full lines, and then to remove the plugs and burr or upset the end edges of the bar. By reason of the shape of the bars, which permits the ends of the bars to be inserted into the drums in directions substantially radially of the drums, the bars may be readily and rel/n1 as e ily in ert in opening in the 1 1 12 of a s t nug y fit the nd t he be ts, thus facilitating the forming of water. tight connections between the drums or headers and the bars, l/Vorn out or defective water bars can thus be replaced by new oneswithout disturbingany of the otherbarsor the drums, except for removing the plugs as the bar to be removed can be turned about the axis of one of its ends until the other end, which has been withdrawn from its drum, is clear of that drum and the tube may then be withdrawn from the other drum without interfering with either of the drums.

The lower drums or headers 26 rest upon the refractory supports 11 and form a tight connection preventing air from passing from the grate beneath the lower drum or header.

33 designate refractory spacing blocks or fire bricks connecting the upper drums or headers 24 with the boiler. These spacing bricks preferably form a tight connection between the upper drums and prevent air, gases or products of combustion from passing over the upper drums without entering the central combustion space beneath the boiler.

When it is desired to check the fire or re. duce steam pressure, the door may be opened and cold air permitted to pass through the boiler, thereby effecting a very substantial and quick reduction in boiler temperatures.

I claim as my invention:

1. In a boiler furnace the combination with a boiler, of a pair of oppositely arranged upper water drums, spaced from the sides of the furnace and being in communication with said boiler, a pair of oppositely arranged lower drums spaced from the sides of the furnace and from said upper drums, the distance between the lower drums being less than that between the upper drums to stagger the said upper and lower drums, and a plurality of relatively resilient sinuous tubes connecting the upper water drum at each side of the furnace with the lower drum at that side and having substantially parallel end portions extending substantially radially of and into said drums through openings therein and being placed in operative position by first placing one end of the tube into the corresponding opening in the drum, then turning said tube to place the other end into registration with an opening in the other drum and moving the tube lengthwise to place said other end into said drum, the intermediate portion of the tubes being bent to form a fuel supporting hump a short distance above the bottom grate and curved inwardly towards the center of the furnace abovethe hump to form a concave fuel receiving portion, the hump and the concave fuel receiving portion being adaptt ed o s pport. t e, uel fi m y wh ashe are 7 b ing removed from the bottom grate below ,thehump.

r 2,111 a boiler furnace the combination witlnasboiler, of a pair of oppositely arranged upper water drums spaced from said boilerand from the sides of said furnace, said, drums being, in communication, w th V said boiler, a pair of oppositely arranged lower drums spaced from the sides of said furnace and from said upper water, drums,

the distance between the lower drums being less than that between the upper drums to stagger the upper and lower drums, a plurality of relatively resilient sinuous tubes form a fuel supporting hump a short distance above the bottom grate and curved inwardly towards the center of the furnace above the hump to form a concave fuel receiving portion, the hump and the concave fuel receiving portion being adapted to support the fuelfirmly while ashes are being.

removed from the bottom grate below the hump, and refractory runners sealing the spaces between said upper drums and the boiler and exposing the boiler at'opposite sides of the runners to'the direct heat of the furnace, the space between the opposite drums and tubes being open and extending from the boiler to the-extreme bottom of the furnace.

3. In a boiler furnace, the combination with a boiler, of a pair of oppositely ar-- ranged upper water drums spaced from said boiler and from the sides of said furnaces, said drums being in communication with said boiler, a pair of oppositely arranged lower drums spaced from the sides of the furnace and from said upper water drums, the distance between the lower drums being less than that between the upper drums to stagger the upper and lower drums, a pluralityv of relatively resilient sinuous tubes connecting the upper and lower drums at each side of the furnace and having approximately parallel end portions extending substantially radially of and into said drums through openings therein and being placed into operative position by first placing one end of the tube into the corresponding opening in the drum, then turning said tube to place the other end into registration with an opening in the other drum and moving the tube lengthwise to place said other end into said drum, the intermediate portion of the tubes being bent to form a fuel supporting hump a short dis tance above the bottom grate and curved inwardly towards the center of the furnace above the hump to form a concave fuel receiving portion, the hump and the concave fuel receiving portion being adapted to support the fuel while ashes are being removed from the bottom grate below the hump, refractory runners sealing: the space between the upper drums and the boiler, refractory runners supporting said lower drums and removable plugs in said drums substantially Without removing said drums or said runners, the ends of the tubes belng dlsposed at an angle to the said runners to permit the said spacing of the plugs from the runners.

GEORGE S KENT. 

